Convenience store operator Wawa Inc. earned a spot in the top 20, but was also classified as a supermarket by Temkin.

The ratings were based on three factors:

1.Success: How do experiences meet the needs of customers?2.Effort: Does the business make it easy for customers to do what they want to do?3.Emotion: How do customers feel about shopping in a retailer's store or website?

To generate the 2016 Temkin Experience Ratings, the firm asked 10,000 U.S. consumers to rate their recent interactions with 294 companies across 20 industries and then evaluated those experiences across the three dimensions of success, effort and emotion.